Revert "igb: Fix a deadlock in igb_sriov_reinit"

This reverts commit 3eb14ea ("igb: Fix a deadlock in
igb_sriov_reinit")
It is the same as commit f468adc ("igb: missing rtnl_unlock in
igb_sriov_reinit()")
There is no rtnl_lock() in igb_resume before, rtnl_unlock will cause a
deadlock.

Signed-off-by: Arika Chen <arika.chen@huawei.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igb/igb_main.c

@@ -7579,7 +7579,6 @@ static int igb_resume(struct device *dev)
 
 	if (igb_init_interrupt_scheme(adapter, true)) {
 		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
-		rtnl_unlock();
 		return -ENOMEM;
 	}